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Finding the Fourth Proportional to 279,677.88, 388,636.65 and 276,800.76

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Solution

The fourth proportional to 279,677.88, 388,636.65 and 276,800.76 is: 384,638.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,677.88 : 388,636.65 = 276,800.76 : x
  2. Step 2: Convert to fraction form
    279,677.88/388,636.65 = 276,800.76/x
  3. Step 3: Cross multiply
    279,677.88x = 388,636.65 × 276,800.76
  4. Step 4: Simplify right side
    279,677.88x = 107,574,920,083.85
  5. Step 5: Solve for x
    x = 107,574,920,083.85/279,677.88
  6. Step 6: Final answer
    x = 384,638.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.